109 
Finally I shall note that some parasitic Hymenoptera attack the 
Sciomyzids; Gercke mentions Phygadeuon cinctorius Grav. as com- 
mon on Sepedon sphegeus. I have myself bred a Cryptine and a 
wingless Proctotrupid from Tetanocera fermginea, a Cryptine and a 
Chalcidid from Calobaea, and likewise a Cryptine and a Chalcidid 
from Ctenulus punctatus, in all cases a single parasite from each 
pupa; from Ct. pectoralis thereagainst I bred no parasite. 
19-6—1923. 
